Lenze DDS System bus CAN for PLC - Manual (Page 170)

11.10 L_CanDSxNodeGuarding − carrying out a "Node guarding"
System bus (CAN) for Lenze PLC devices
LenzeCanDSxDrv.lib function library
11−14
L
PLC−Systembus EN 2.0
4. Set the factor for the "NodeLifeTime" monitoring time via C0383 in the PLC to be monitored.
This value has to correspond to the setting at the FB input byNodeLifeTimeFactor in the
monitoring PLC:
Code LCD Possible settings Information
Lenze Selection
C0383 LifeTimeFact. 0 System bus: Node Guarding (slave):
NodeLifeTimeFactor
0 {1} 255
Tip!
From the settings for the "NodeGuardTime" (C0382) and the "NodeLifeTimeFactor" (C0383) in the
PLC to be monitored, the so−called "NodeLifeTime" results:
NodeLifeTime = NodeGuardTime(C0382)
ž
NodeLifeTimeFactor (C0383)
·
If the PLC to be monitored does not receive a status enquiry from the monitoring PLC within
this "NodeLifeTime", a so−called "Life Guarding" event is actuated in the PLC to be
monitored.
5. Set the desired response by which the PLC to be monitored is to react to a "Life Guarding
Event" via C0384 in the PLC to be monitored:
Code LCD Possible settings Information
Lenze Selection
C0384 Err NodeGuard 3 System bus: Node Guarding (slave):
response to a "Life Guard" event.
0 TRIP
1 Message
2 Warning
3 Off
4 Fail−QSP
6. Set code C0003 in the PLC to be monitored to the value "1" to save the effected changes in a
manner safe against mains failure.
7. Set code C0358 in the PLC to be monitored to the value "1" to carry out a CAN reset node.
– Alternatively, the CAN reset node can also be carried out by mains switching.
After the CAN reset node has been carried out, the PLC to be monitored is configured as "node
guarding slave", and monitoring in the "node guarding master" can be activated using this FB.